Saw-guide.



PATENTED FEB. 5, 1907.

H. W. GARLAND.

- SAW GUIDE. APPLICATION FILED MAB-.22. 1906.

2 SHEETS-SHEET 1.

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PATENTED FEB. 5, 190'7.

'EL W. GARLAND.

SAW GUIDE.

A PPLIoATIoN FILED um. 22. 1906.

2 BEEETB-SHBET 2.

lNVENTOR ATTORNEY TH: Nok/tls Pxrtn: Ca.. wAsmNnroN, n.

UNITED STATES PATE NT OFFICE.

HARRISON /V. GARLAND, OF BAY CITY, MICHIGAN, ASSIGNOR TO M. GAR- LAND CO., OF BAY CITY, MICHIGAN.

SAW-GUIDE.

Specification of Letters Patent.

Patented Feb. 5, 1907.

Application filed March 22, 1906. Serial No. 307,450.

To @ZZ whom zit may concern:

Be it known that I, HARRISON W. GAR- LAND, a citizen of the United States, residing at Bay City, in the county ot' Bay and State of Michigan, have invented certain new and useful Improvements in Saw-Guides; and I do hereby declare the `following to be a t'ull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to saw-guides, one object oit which is the provision of a device or preventing the sagging of a band-saw.

IIitherto it has been inadvisable to provide a machine having a long band-saw of large capacity for the reason that the saw would sag intermediate its supports and make bad lumber unless guides were provided, and the forms of guides with which I am familiar tend to heat up the saw, owing to the high speed at which the latter travels, thus causing an infinite amount of trouble, and such have not been very successful.

My object is to provide a machine capable of operating a long saw, the saw to be guided and supported intermediate the wheels.

A further object is the provision of means for cooling the saw, such means in the present embodiment of my invention taking the form of hollow guides, through which circulates a cooling medium.

To these ends therefore my invention consists in certain novel features and combinations of parts, together with their equivalents, such as will be more iully disclosed hereinafter and particularly set torth in the claims.

In the accompanying drawings, illustrating one of the many embodiments of my nvention, Figure l is an enlarged top plan view ot' one oi the guides. Fig. 2 is a side view otl the same, and Fig. 3 is a side view of a slightlymodi'lied form of guide.

This invention is adapted for use in those horizontal band-sawing machines equipped with long band-saws and capable of operating upon a plurality of boards or lumber simultaneously presented at two different points` in the length of the saw but the invention is byno means restricted in its use to such machines, as it is capable of use with any bandsaw machine with which I am Jfamiliar.

means for supporting and cooling the saw,

one embodiment of which consists in the provision ol suitable standards conveniently reduced at their upper ends, as at 38a. Guide-blocks 39 39, apertured near one end, are keyed or otherwise secured to the reduced upper ends oi" the standards, said guide-blocks each being hollow and provided with interspaced ribs 40 40, the blocks adapted to receive a cooling medium which is caused to take a circulatory course through the blocks by reason ot the ribs 40 40. Each block is preferably rectilinear in contour and is provided near its rear end with apertured lugs 4l 4]A for receiving bolts, whereby the blocks are secured together in pairs, portions ol their abutting faces being recessed,as at 42 42, forwardly of the reduced portions 3S to receive the saw, and preferably the recessed walls are babbitted at that point where they engage the saw, as shown at 43 43. The rear ends of each block are channeled, as at 44 45, the channels terminating in oriiices in which are fixed the ends of supply and discharge pipes 46 and 47, the supply-pipes leading from any suitable pressure source while the discharge-pipes receive the cooling medium, as water or other liquid, alter it has completed its circulatory course through the block. In this manner the blocks are always kept at a reduced temperature, which is transmitted or communicated. to the saw to prevent overheating. It is sometimes true that the temperature of the saw, in spite of the cooled guides, will become too great, in view ot which it is desirable to bring the cooling medium directly in contact therewith. As one means for accomplishing this I preferably form small perforations 48 4S through the babbitting and through the bottom of the upper blocks, which perforations are normally closed by a series ot plugs 49 49, having tapering points 50 50 received in the pertorations, the plugs extending through the top of the upper block, in which they have a snug ht or through which they are threaded. Thus IOO when it is desirable the plugs 49 49 are raised vto allow the cooling liquid to pass through vthe periorations and contact directly with fthe saw. Preferably the plugs are not entirely removed from the blocks, but simply raised sufficiently to permit the access of the cooling medium to the perforations. The above constitutes the preferred form of this portion of my invention, but in Fig. 3 I have illustrated a slight modification wherein I ,j

have substituted rolls 5l 5l in place of the blocks, the rolls being rotatably mounted on hollow shafts 52 52, the rolls spaced apart from each other to receive the saw therebetween. The supply-pipes 46 46 are connected to one end of each of the hollow shafts and the disc'iarge-pipes 47 47 communicate with the opposite ends of said shafts, whereby a continuous circulation of a cooling mefor maintaining a circulation of a cooling medium 'through the members.

3. A guide for band-saws comprising a pair of hollow blocks having inlet and outlet channels, ribs located within the blocks to cause a circulation therein of a cooling medium, inlet and outlet pipes communicating with the inlet and outlet channels to supply 1 the cooling medium to the blocks and convey it therefrom and a cutter passing between the blocks.

4. A guide and support for band-saws or other cutter' comprising a hollow member in contact with the cutter and means for effecting the circulation of a cooling medium therethrough.

5. A guide and support for traveling cutters comprising ahollow block, means Jfor maintaining the circulation of a cooling medium therethrough, and means for permitting the cooling medium to have direct contact with the cutter.

6. A guide and support for traveling cutters, comprising a hollow block, means for maintaining the circulation of a cooling medium therethrough., the block having a series of apertures therein to permit access of the cooling medium directly to the cutter and plugs for removably closing the apertures.

7. A guide and support for traveling cutters comprising a pair of hollow blocks located adjacent each other, the adjacent surfaces of the blocks being recessed, a traveling member received in the space formed by the recesses, means for maintaining the circulation of a cooling medium through the blocks, one of said blocks being perforated to permit the cooling medium to have direct contact with the traveling member and 'removable plugs for closing the perforations.

In testimony whereof I aIiX my signature in presence of two witnesses.

HARRISON WV. GARLAND.

Witnesses:

JAS. E. DUFFY, EDITH BOUNIN. 

